研究者詳細 - 植村　立

論文 - 植村　立

分割表示 63 件中 21 - 40 件目／全件表示 >>

Experimental evaluation of oxygen isotopic exchange between inclusion water and host calcite in speleothems 査読有り

Uemura Ryu, Kina Yudai, Shen Chuan-Chou, Omine Kanako

CLIMATE OF THE PAST 16 巻 ( 1 ) 頁： 17 - 27 2020年1月

Reduced marine phytoplankton sulphur emissions in the Southern Ocean during the past seven glacials 査読有り

Goto-Azuma K., Hirabayashi M., Motoyama H., Miyake T., Kuramoto T., Uemura R., Igarashi M., Iizuka Y., Sakurai T., Horikawa S., Suzuki K., Suzuki T., Fujita K., Kondo Y., Hattori S., Fujii Y.

NATURE COMMUNICATIONS 10 巻頁： 3247 2019年7月

Dominant influence of the humidity in the moisture source region on the 17O-excess in precipitation on a subtropical island 査読有り

Yuina Uechi, Ryu Uemura

Earth and Planetary Science Letters 513 巻頁： 20-28 2019年2月

Marine Isotope Stage 4 in Australasia: A full glacial culminating 65,000 years ago – Global connections and implications for human dispersal 招待有り査読有り国際共著

Patrick De Deckker, Lee J Arnold, Sander van der Kaars, Germain Bayon, Jan-Berend W Stuut, Kerstin Perner, Raquel Lopes dos Santos, Ryu Uemura, Martina Demuro

Quaternary Science Reviews 204 巻頁： 187 - 207 2019年1月

Abrupt ice-age shifts in southern westerly winds and Antarctic climate forced from the north

Christo Buizert, Michael Sigl, Mirko Severi, Bradley R. Markle, Justin J, We, stein, Joseph, R. McConnell, Joel B. Pedro, Harald Sodemann, Kumiko Goto-Azuma, Kenji Kawamura, Shuji Fujita, Hideaki Motoyama, Motohiro Hirabayashi, Ryu Uemura, Barbara Stenni, Frédéric Parrenin, Feng He, T. J. Fudge, Eric J. Steig

Nature 563 巻 ( 7733 ) 頁： 681 - 685 2018年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2018, Springer Nature Limited. The mid-latitude westerly winds of the Southern Hemisphere play a central role in the global climate system via Southern Ocean upwelling 1 , carbon exchange with the deep ocean 2 , Agulhas leakage (transport of Indian Ocean waters into the Atlantic) 3 and possibly Antarctic ice-sheet stability 4 . Meridional shifts of the Southern Hemisphere westerly winds have been hypothesized to occur 5,6 in parallel with the well-documented shifts of the intertropical convergence zone 7 in response to Dansgaard–Oeschger (DO) events— abrupt North Atlantic climate change events of the last ice age. Shifting moisture pathways to West Antarctica 8 are consistent with this view but may represent a Pacific teleconnection pattern forced from the tropics 9 . The full response of the Southern Hemisphere atmospheric circulation to the DO cycle and its impact on Antarctic temperature remain unclear 10 . Here we use five ice cores synchronized via volcanic markers to show that the Antarctic temperature response to the DO cycle can be understood as the superposition of two modes: a spatially homogeneous oceanic ‘bipolar seesaw’ mode that lags behind Northern Hemisphere climate by about 200 years, and a spatially heterogeneous atmospheric mode that is synchronous with abrupt events in the Northern Hemisphere. Temperature anomalies of the atmospheric mode are similar to those associated with present-day Southern Annular Mode variability, rather than the Pacific–South American pattern. Moreover, deuterium-excess records suggest a zonally coherent migration of the Southern Hemisphere westerly winds over all ocean basins in phase with Northern Hemisphere climate. Our work provides a simple conceptual framework for understanding circum-Antarctic temperature variations forced by abrupt Northern Hemisphere climate change. We provide observational evidence of abrupt shifts in the Southern Hemisphere westerly winds, which have previously documented 1–3 ramifications for global ocean circulation and atmospheric carbon dioxide. These coupled changes highlight the necessity of a global, rather than a purely North Atlantic, perspective on the DO cycle.

DOI： 10.1038/s41586-018-0727-5

Scopus

PubMed

A 180-year-long isotopic record of tree-ring cellulose on Okinawa Island, Japan 査読有り

Ryu Uemura, Miki Uemura, Masaki Sano, Takeshi Nakatsuka

Geochemical Journal 52 巻 ( 6 ) 頁： e21 - e27 2018年11月

Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years 査読有り

Uemura Ryu, Motoyama Hideaki, Masson-Delmotte Valerie, Jouzel Jean, Kawamura Kenji, Goto-Azuma Kumiko, Fujita Shuji, Kuramoto Takayuki, Hirabayashi Motohiro, Miyake Takayuki, Ohno Hiroshi, Fujita Koji, Abe-Ouchi Ayako, Iizuka Yoshinori, Horikawa Shinichiro, Igarashi Makoto, Suzuki Keisuke, Suzuki Toshitaka, Fujii Yoshiyuki

Nature Communications 9 巻 2018年3月

Spatial variation of isotopic compositions of snowpack nitrate related to post-depositional processes in eastern Dronning Maud Land, East Antarctica 査読有り

Noro Kazushi, Hattori Shohei, Uemura Ryu, Fukui Kotaro, Hirabayashi Motohiro, Kawamura Kenji, Motoyama Hideaki, Takenaka Norimichi, Yoshida Naohiro

GEOCHEMICAL JOURNAL 52 巻 ( 2 ) 頁： E7-E14 2018年3月

A 60Year Record of Atmospheric Aerosol Depositions Preserved in a High-Accumulation Dome Ice Core, Southeast Greenland 査読有り

Iizuka Yoshinori, Uemura Ryu, Fujita Koji, Hattori Shohei, Seki Osamu, Miyamoto Chihiro, Suzuki Toshitaka, Yoshida Naohiro, Motoyama Hideaki, Matoba Sumito

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123 巻 ( 1 ) 頁： 574 - 589 2018年1月

Seasonal-Scale Dating of a Shallow Ice Core From Greenland Using Oxygen Isotope Matching Between Data and Simulation 査読有り

Furukawa Ryoto, Uemura Ryu, Fujita Koji, Sjolte Jesper, Yoshimura Kei, Matoba Sumito, Iizuka Yoshinori

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122 巻 ( 20 ) 頁： 10873 - 10887 2017年10月

A global multiproxy database for temperature reconstructions of the Common Era 査読有り

Julien Emile-Geay, Nicholas P. McKay, Darrell S. Kaufman, Lucien von Gunten, Jianghao Wang, Kevin J. Anchukaitis, Nerilie J. Abram, Jason A. Addison, Mark A.J. Curran, Michael N. Evans, Benjamin J. Henley, Zhixin Hao, Belen Martrat, Helen V. McGregor, Raphael Neukom, Gregory T. Pederson, Barbara Stenni, Kaustubh Thirumalai, Johannes P. Werner, Chenxi Xu, Dmitry V. Divine, Bronwyn C. Dixon, Joelle Gergis, Ignacio A. Mundo, Takeshi Nakatsuka, Steven J. Phipps, Cody C. Routson, Eric J. Steig, Jessica E. Tierney, Jonathan J. Tyler, Kathryn J. Allen, Nancy A.N. Bertler, Jesper BjÃ¶rklund, Brian M. Chase, Min-Te Chen, Ed Cook, Rixt de Jong, Kristine L. DeLong, Daniel A. Dixon, Alexey A. Ekaykin, Vasile Ersek, Helena L. Filipsson, Pierre Francus, Mandy B. Freund, Massimo Frezzotti, Narayan P. Gaire, Konrad Gajewski, Quansheng Ge, Hugues Goosse, Anastasia Gornostaeva, Martin Grosjean, Kazuho Horiuchi, Anne Hormes, Katrine Husum, Elisabeth Isaksson, Selvaraj Kandasamy, Kenji Kawamura, K. Halimeda Kilbourne, Nalan Ko{\c{c}}, Guillaume Leduc, Hans W. Linderholm, Andrew M. Lorrey, Vladimir Mikhalenko, P. Graham Mortyn, Hideaki Motoyama, Andrew D. Moy, Robert Mulvaney, Philipp M. Munz, David J. Nash, Hans Oerter, Thomas Opel, Anais J. Orsi, Dmitriy V. Ovchinnikov, Trevor J. Porter, Heidi A. Roop, Casey Saenger, Masaki Sano, David Sauchyn, Krystyna M. Saunders, Marit-Solveig Seidenkrantz, Mirko Severi, Xuemei Shao, Marie-Alexandrine Sicre, Michael Sigl, Kate Sinclair, Scott St. George, Jeannine-Marie St. Jacques, Meloth Thamban, Udya Kuwar Thapa, Elizabeth R. Thomas, Chris Turney, Ryu Uemura, Andre E. Viau, Diana O. Vladimirova, Eugene R. Wahl, James W.C. White, Zicheng Yu, Jens Zinke

Scientific Data 4 巻頁： 170088 2017年7月

State dependence of climatic instability over the past 720,000 years from Antarctic ice cores and climate modeling 査読有り

and Kenji Kawamura, Ayako Abe-Ouchi, Hideaki Motoyama, Yutaka Ageta, Shuji Aoki, Nobuhiko Azuma, Yoshiyuki Fujii, Koji Fujita, Shuji Fujita, Kotaro Fukui, Teruo Furukawa, Atsushi Furusaki, Kumiko Goto-Azuma, Ralf Greve, Motohiro Hirabayashi, Takeo Hondoh, Akira Hori, Shinichiro Horikawa, Kazuho Horiuchi, Makoto Igarashi, Yoshinori Iizuka, Takao Kameda, Hiroshi Kanda, Mika Kohno, Takayuki Kuramoto, Yuki Matsushi, Morihiro Miyahara, Takayuki Miyake, Atsushi Miyamoto, Yasuo Nagashima, Yoshiki Nakayama, Takakiyo Nakazawa, Fumio Nakazawa, Fumihiko Nishio, Ichio Obinata, Rumi Ohgaito, Akira Oka, Jun'ichi Okuno, Junichi Okuyama, Ikumi Oyabu, Fr{\'{e}}d{\'{e}}ric Parrenin, Frank Pattyn, Fuyuki Saito, Takashi Saito, Takeshi Saito, Toshimitsu Sakurai, Kimikazu Sasa, Hakime Seddik, Yasuyuki Shibata, Kunio Shinbori, Keisuke Suzuki, Toshitaka Suzuki, Akiyoshi Takahashi, Kunio Takahashi, Shuhei Takahashi, Morimasa Takata, Yoichi Tanaka, Ryu Uemura, Genta Watanabe, Okitsugu Watanabe, Tetsuhide Yamasaki, Kotaro Yokoyama, Masakazu Yoshimori, Takayasu Yoshimoto

Science Advances 3 巻 ( 2 ) 頁： e1600446 2017年2月

Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka 査読有り

F. PARRENIN, S. FUJITA, A. ABE-OUCHI, K. KAWAMURA, V. MASSON-DELMOTTE, H. MOTOYAMA, F. SAITO, M. SEVERI, B. STENNI, R. UEMURA, E. W. WOLFF

Journal of Glaciology 62 巻 ( 236 ) 頁： 1037 2016年12月

Physicochemical properties of bottom ice from Dome Fuji, inland East Antarctica 査読有り

Ohno Hiroshi, Iizuka Yoshinori, Hori Akira, Miyamoto Atsushi, Hirabayashi Motohiro, Miyake Takayuki, Kuramoto Takayuki, Fujita Shuji, Segawa Takahiro, Uemura Ryu, Sakurai Toshimitsu, Suzuki Toshitaka, Motoyama Hideaki

JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 121 巻 ( 7 ) 頁： 1230-1250 2016年7月

Spatial distributions of soluble salts in surface snow of East Antarctica 査読有り

Yoshinori Iizuka, Hiroshi Ohno, Ryu Uemura, Toshitaka Suzuki, Ikumi Oyabu, Yu Hoshina, Kotaro Fukui, Motohiro Hirabayashi, Hideaki Motoyama

Tellus B 68 巻 ( 0 ) 2016年7月

Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica 査読有り

Ryu Uemura, Kosuke Masaka, Kotaro Fukui, Yoshinori Iizuka, Motohiro Hirabayashi, Hideaki Motoyama

Geophys. Res. Lett. 43 巻 ( 11 ) 頁： 5878 2016年6月

Acquisition of isotopic composition for surface snow in East Antarctica and the links to climatic parameters 査読有り

Alexandra Touzeau, AmaÃ«lle Landais, Barbara Stenni, Ryu Uemura, Kotaro Fukui, Shuji Fujita, Sarah Guilbaud, Alexey Ekaykin, Mathieu Casado, Eugeni Barkan, Boaz Luz, Olivier Magand, Gr{\'{e}}gory Teste, Emmanuel Le~Meur, M{\'{e}}lanie Baroni, JoÃ«l Savarino, Ilann Bourgeois, Camille Risi

The Cryosphere 10 巻 ( 2 ) 頁： 837 2016年4月

Precise oxygen and hydrogen isotope determination in nanoliter quantities of speleothem inclusion water by cavity ring-down spectroscopic techniques 査読有り

Ryu Uemura, Masashi Nakamoto, Ryuji Asami, Satoru Mishima, Masakazu Gibo, Kosuke Masaka, Chen Jin-Ping, Chung Che Wu, Yu Wei Chang, Chuan Chou Shen

Geochimica et Cosmochimica Acta 172 巻頁： 159-176 2016年1月

Late Holocene coral reef environment recorded in Tridacnidae shells from archaeological sites in Okinawa-jima, subtropical southwestern Japan 査読有り

Asami R, Konishi M, Tanaka K, Uemura R, Furukawa M, Shinjo R

Island Arc 24 巻 ( 1 ) 頁： 61-72 2015年

Chemical compositions of sulfate and chloride salts over the last termination reconstructed from the Dome Fuji ice core, inland Antarctica 査読有り

Oyabu I, Iizuka Y, Uemura R, Miyake T, Hirabayashi M, Motoyama H, Sakurai T, Suzuki T, Hondoh T

Journal of Geophysical Research Atmospheres 119 巻 ( 24 ) 頁： 14045-14058 2014年

　前のページ - 次のページ　

<植村 立>

論文 - 植村 立

<植村　立>

論文 - 植村　立